Rotary harrow



(No Model.).

C. HAWLEY.

ROTARY HARROW.

No. 321,105. Patented June 30, L885.

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NITED CLINTON HAVLEY, OF MULBERRY GROVE, ILLINOIS.

ROTARY HARROW.

SPECIFICATION forming part of Letters Patent No. 321,105, dated June 30, 1885,

Application filed November 25, 1884. (No model.) i

To all whom it may concern.-

Be it known that I, CLINTON HAWLEY, a citizen of the United States, residing at Mulberry Grove, in the county of Bond and State of Illinois, have invented a new and useful Improvement in Rotary Harrows,of which the, following is a specification, reference being had to the accompanying drawings.

My invention relates to rotary harrows; and it consists in the construction and novel arrangement of parts, as will be hereinafter fully described, and particularly pointed out in the claim.

In the drawings, Figure 1 is a view in perspective of a rotary harrow embodying my improvements. Fig. 2 is a side elevation. Fig. 3 is avertical longitudinal sectional view taken through the middle line of the tongue and through two of the radial tooth-bars directly beneath it.

Referring by letter to the accompanying drawings, A designates the hub of the rotary harrow, which hub consists of a lower annular plate, B, and an upper annular plate, 0, between which a single tooth-bar D, which crosses between the plates B and O, is bolted,

, to form two of the radial tooth-bars or radial arms D and to strengthen the hub of the harrow. The other radial arms or bars D do not pass through but enter at their inner ends between the annular plates B and O, where they are securely bolted by a series of bolts, E, which project upward above the upper annular plate, 0, to connect with an annular ring, G, which is of the same diameter as the plates B and O. Collars are fitted 011 the upper ends of the bolts E, and are interposed between the plate 0 and the ring G, to suspend the latter above the harrow-frame.

H designates the vertical spindle of the hub, formed as above described.

Near their outer ends, or intermediate of the hub and the ends of the radial bars of I the harrow, the radial arms or tooth-bars are connected and strengthened by an annular ring, I, which latter also serves as a track for the small friction-wheel, J, working in bearings in a hanger, J, secured to and depending from the under side of the draft-bar K, near the forward end of the same.

The rear end of the draft-barK is bifurcated or forked in rear of its pivotal point, and is provided on the rear end of each tine of the fork with a friction-wheel, L, which also travels on the annular track I when the harrow is operated-that is to say, when the harrow is rotated by driving the team forward the harrow will be moved, and the wheels J and L will be revolved and permit the draft-bar K to retain its position in the line of the draft.

The drivers seat M is mounted over the spindle H, to which the draft-bar K is pivoted on legs secured to and rising from said draftbar K.

The friction-wheelsL are made larger than the friction-wheel J. At its connection with the spindle H the draft-bar K is slotted, to allow the small wheel J to pass over any obstruction that may come upon the annular ring or track, which it does by permitting vertical play of the draft-bar. on its spindle. This is also true of the rear wheels.

It will be seen that the barrow-teeth P, which are attached to the bars or arms D of the harrow, extend downward at an angle to the bars, this peculiar slant causing the teeth to penetrate more deeply into the ground, thereby producing a greater resistance, and a consequent revolution of the harrow as it advances.

It will be observed that two of the radial arms cross in the center, giving strength to the center of the harrow. The annular ring G forms a track for a grooved roller, R,working on avertical shaft, R, having its upper bearing in the draft-bar and its lower bearing in brackets or arms S, secured to the draftbar. The grooved roller or friction-wheel R is designed to and does relieve the spindle H from strain.

- The two wheels at the rear end also prevent side strain, so that the drivers seat may be placed on the draft-bar.

Having thus fully described my invention what I claim as new, and desire to secure by Letters Patent of the United States, is

In a harrow, the hub A, having the radial tooth-bars secured to the same, and the annular ring G, secured above the hub, in combination with the bolt or spindle H, the draftbar'K, slotted at its center to receive the spindle, a seat mounted on the draft-bar, the

rear end of the latter being bifurcated or forked and provided with friction-Wheels L L, the friction-roller J, depending from the draft-bar at the front; end, and the grooved 5 roller R, working horizontally against the periphery or edge of the ring G, as set; forth. In testimony that I claim the foregoing as my own Ihan'e hereto aflixed my signature in presence of two witnesses.

OLIN TON HAXVLEY.

\Vitnesses:

ADAM TOMBAUG I-I, THOMAS F. BANKS. 

